13. 根據下列遞迴定義，F₇ = ? F_0 = 0 F_1 = 1 F_n = F_n-1 + F_n-2 (n >= 2) (A) 7 (B) 8 (C) 13 (D) 21

19. 假設一關聯式資料庫中有一表格名為 student，包含 name (varchar(10))、score (int)、department (varchar(10))、studentID (char(10)) 四個欄位，請問下列查詢語法何者不正確？ (A) select studentID from student; (B) select name, studentid from student where score \( < 60 \) (C) select count(*) from student group by department; (D) select avg(*) from student where department = cs;